Uncaught (in promise) Error: Component series.map not exists. Load it first

1、错误描述

Uncaught (in promise) Error: Component series.map not exists. Load it first. 
at Function.entity.getClass (clazz.js:178)
at ExtendedClass. (Global.js:223)
at Array.forEach ()
at each (util.js:298)
at ExtendedClass.visitComponent (Global.js:212)
at Function.entity.topologicalTravel (component.js:125)
at ExtendedClass.mergeOption (Global.js:194)
at ExtendedClass.initBase (Global.js:663)
at ExtendedClass.resetOption (Global.js:141)
at ExtendedClass.setOption (Global.js:123)
index.vue?a44b:214 Array(102)

2、错误原因

      在vue.js中使用echarts地图时，出现了这个错误提示，echarts中的series引入type:'map'

 series: [{
   name: '数据',
   type: 'map',
   mapType: 'hunan',
   roam: true,
   label: {
      normal: {
         show: true
      },
      emphasis: {
          show: false
      }
   },
   data: mapData
}]

3、解决办法

      由于在加载echarts图形相关的文件时，是依次加入的，单独缺少map

const echarts = require('echarts/lib/echarts')
const axios = require('axios')
require('echarts/lib/chart/map')
require('echarts/lib/chart/bar')
require('echarts/lib/chart/line')
require('echarts/lib/component/tooltip')
require('echarts/lib/component/title')